Direct Answer
The FTSE AIM 100 is a rule-based measurement of the 100 largest AIM-listed companies by market capitalisation, maintained by FTSE Russell. Like every index it owns nothing: it is a number produced by applying a published weighting formula to a selected list of securities, revised on a schedule the provider sets.
What this index covers
The FTSE AIM 100 covers the 100 largest AIM-listed companies by market capitalisation. FTSE Russell defines which securities are eligible, how they are selected from that pool, and how much each one contributes to the published number.
The methodology document, published by FTSE Russell, sets the rules for inclusion and removal. Corporate actions, index reviews, and eligibility changes all move the constituent list on the timetable the provider specifies.
How constituents are weighted
Swoopr has not verified the weighting method for this index against FTSE Russell's current methodology document, so none is stated here rather than guessed. The provider link below is authoritative.
Current FTSE AIM 100 constituents
FTSE Russell publishes and licenses the FTSE AIM 100 constituent list. Swoopr does not republish it here. The provider's own page is the authoritative source for current membership and weights.
Related reading
- All stock market indexes: how indexes are built, weighted and revised.
- Europe indexes: others covering the same region.
- Index concentration: measuring how much of an index sits in its largest holdings.
- Index rebalancing and inclusion effects: what happens to a stock when index membership changes.
Frequently Asked Questions
Who maintains the FTSE AIM 100?
FTSE Russell maintains the FTSE AIM 100 and publishes the methodology document that defines its eligibility and weighting rules.
What does the FTSE AIM 100 measure?
It measures the 100 largest AIM-listed companies by market capitalisation. The index is a calculated number applying a weighting formula to a selected list of securities, and it holds nothing itself.
Where can I see the current FTSE AIM 100 constituents?
FTSE Russell publishes the current constituent list. Swoopr does not republish it, because index providers license constituent data and Swoopr holds no such licence.